JP2009164816A - Wireless communication system, first wireless communication apparatus, second wireless communication apparatus, wireless receiving method, and wireless transmitting method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To obtain an excellent frequency diversity effect by selecting one rule from a plurality of preset rules and also selecting the rule for enlarging a frequency interval of the combination of physical resource assignment units for assigning a virtual resource assignment unit. <P>SOLUTION: The wireless communication apparatus executes dispersion transmission by dividing a virtual resource assignment unit for assignment to a plurality of dispersed physical resource assignment units in the frequency direction. In this case, the wireless communication apparatus is provided with a resource correspondence specifying unit 15 for selecting one rule from the rules of combination and sequence of the physical resource assignment unit for assigning the virtual resource assignment unit and determining the physical resource assignment unit for assigning the virtual resource assignment unit using this selected rule, an assignment information generating unit 16 for generating wireless resource assignment information including at least the information indicating the rule selected by the resource correspondence specifying unit 15 and the information indicating the physical resource assignment unit for assigning the virtual resource assignment unit with the starting position and the number of the virtual resource assignment unit, and a multiplexing unit for multiplexing the wireless resource assignment information to the transmitting signal. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a radio communication system, a first radio communication device, a second radio communication device, a radio reception method, and a radio transmission method.

  As a third generation (3G) radio access system for cellular mobile communications, W-CDMA (Wideband Code Division Multiple Access) system is standardized in 3GPP (3rd Generation Partnership Project), and cellular mobile communications based on this system The service is started. In 3GPP, 3G evolution (Evolved Universal Terrestrial Radio Access; hereinafter referred to as “EUTRA”) and 3G network evolution (Evolved Universal Terrestrial Access Network) are being studied.

  As the downlink of EUTRA, an OFDM (Orthogonal Frequency Division Multiplexing) scheme that is multicarrier transmission has been proposed. In addition, as an uplink of EUTRA, a single carrier communication method of DFT (Discrete Fourier Transform) -Spread OFDM method which is single carrier transmission has been proposed.

  Here, the outline of the channel structure in EUTRA is shown in FIG. The base station device BS1 performs radio communication with the mobile station devices UE1, UE2, and UE3. The downlink of radio communication from the base station apparatus BS1 of EUTRA to the mobile station apparatuses UE1, UE2, and UE3 includes a downlink pilot channel, a downlink synchronization channel, a broadcast channel, a downlink control channel, and a downlink shared data channel. A control format indicator channel and a downlink HARQ (Hybrid Automatic Repeat reQuest) indicator channel. Further, the uplink of radio communication from the mobile station apparatuses UE1, UE2 and UE3 of the EUTRA to the base station apparatus BS1 is made up of an uplink pilot channel, a random access channel, an uplink control channel, and an uplink shared data channel. It is configured.

  FIG. 15 is a diagram illustrating a schematic configuration of a downlink radio frame in EUTRA (Non-Patent Document 1). The horizontal axis represents the frequency domain, and the vertical axis represents the time domain. The downlink radio frame is a unit such as radio resource allocation for localized transmission, and is composed of a PRB (Physical Resource Block) pair consisting of a frequency band and a time band of a predetermined width. . Basically, one physical resource block PRB pair is composed of two physical resource blocks PRB that are continuous in the time domain.

  One physical resource block PRB is composed of 12 subcarriers in the frequency domain, and is composed of 7 OFDM symbols in the time domain. The system bandwidth is a communication bandwidth of the base station device. In the time domain, there are a slot composed of 7 OFDM symbols, a subframe composed of 2 slots, and a radio frame composed of 10 subframes. A unit composed of one subcarrier and one OFDM symbol is called a resource element. In the downlink radio frame, a plurality of physical resource blocks PRB are arranged according to the system bandwidth.

  In each subframe, at least a downlink shared data channel used for transmitting information data and a downlink control channel used for transmitting control data are arranged. The downlink pilot channels used for channel estimation of the downlink shared data channel and the downlink control channel are not shown in FIG. 15, and their arrangement will be described later. In FIG. 15, the downlink control channel is arranged in the first, second and third OFDM symbols of the subframe, and the downlink shared data channel is arranged in other OFDM symbols. The OFDM symbol in which the control channel is arranged varies in subframe units.

  Although not shown in FIG. 15, the control format indicator channel indicating the number of OFDM symbols constituting the downlink control channel is arranged at a predetermined frequency position of the first OFDM symbol, and the downlink control channel is 1 It is arranged only in the first OFDM symbol, or is arranged in the first and second OFDM symbols. Similarly, although not shown in FIG. 15, the downlink HARQ indicator channel is arranged over the first OFDM symbol or the first to third OFDM symbols, and the downlink HARQ indicator channel is assigned to the downlink HARQ indicator channel. The number of OFDM symbols to be arranged and the number of OFDM to arrange one downlink HARQ indicator channel are indicated by a broadcast channel. Note that the downlink control channel and the downlink shared data channel are not arranged together in the same OFDM symbol. In the downlink control channel, a mobile station identifier or a mobile station group identifier, radio resource allocation information of the downlink shared data channel, multi-antenna related information, modulation scheme, coding rate, payload size, retransmission parameter, and the like are arranged.

  FIG. 16 is a diagram for explaining an arrangement of downlink pilot channels in one physical resource block PRB pair in the downlink of EUTRA. In FIG. 16, the horizontal axis represents the time domain, and the vertical axis represents the frequency domain. Here, a case where the base station apparatus has four transmission antennas (transmission antenna 1, transmission antenna 2, transmission antenna 3, and transmission antenna 4) will be described. In FIG. 16, resource elements denoted by reference symbol R1 represent downlink pilot channel resource elements transmitted by transmission antenna 1, and resource elements denoted by reference symbol R2 are downlink pilot channel resources transmitted by transmission antenna 2. The resource element denoted by reference symbol R3 represents the resource element of the downlink pilot channel transmitted by the transmission antenna 3, and the resource element denoted by reference symbol R4 is the resource of the downlink pilot channel transmitted by the transmission antenna 4. Represents an element.

  When the base station apparatus has only two transmission antennas, the downlink control channel is transmitted in resource elements R3 and R4 in the second OFDM symbol, and the downlink is transmitted in resource elements R3 and R4 in the ninth OFDM symbol. A link shared data channel is transmitted. Note that the base station apparatus having four transmission antennas can adaptively control the transmission of the resource elements R3 and R4 of the downlink pilot channel of the transmission antenna 3 and the transmission antenna 4 in the time domain. That is, the base station apparatus arranges resource elements R3 and R4, which are downlink pilot channels, as described above in a certain subframe, and does not arrange resource elements R3 and R4 in a certain subframe. Only resource elements R1 and R2 are arranged. The downlink pilot channel arrangement information is indicated by a broadcast channel. Note that, since it is not related to the present invention, details on the broadcast channel and the downlink synchronization channel are omitted, but the broadcast channel and the downlink synchronization channel are predetermined resource elements of a predetermined subframe. Placed in.

  EUTRA has a plurality of transmission methods. One transmission method is that a base station device changes a physical resource block PRB pair unit to a mobile station device with good radio channel quality based on CQI (Channel Quality Indicator) fed back from the mobile station device to the base station device. The centralized transmission (Localized transmission) mainly assumes the application of frequency scheduling for performing radio resource allocation. Another transmission method is a mobile station apparatus that does not perform frequency scheduling, such as a mobile station apparatus that moves at high speed, a mobile station apparatus that transmits and receives a small amount of data such as VoIP (Voice over Internet Protocol), TCP ACK (Transmission Control Protocol ACKnowledgement), etc. There is distributed transmission (Distributed transmission) mainly assuming application to a device. Centralized transmission is a method in which transmission is performed using subcarriers grouped in physical resource block PRB pairs, and distributed transmission is performed in a time domain and frequency domain in a finer unit than physical resource block PRB pairs over a wide band. In this method, signals are transmitted in a distributed manner.

  The transmission data unit of the mobile station apparatus is called VRB (Virtual Resource Block), and the transmission data unit of the mobile station apparatus that performs centralized transmission is LVRB (Localized Virtual Resource Block), which performs distributed transmission. The transmission data unit of the mobile station apparatus is called DVRB (Distributed Virtual Resource Block). A physical resource block PRB pair used for transmission of the distributed virtual resource block DVRB is referred to as a distributed physical resource block DPRB (Distributed Physical Resource Block). The number of distributed virtual resource blocks DVRB multiplexed on one distributed physical resource block DPRB is referred to as a multiplexing number Nd. The distributed virtual resource block DVRB is a physical resource in a finer unit than the physical resource block PRB pair unit, and is composed of physical resources distributed over a wide band. In EUTRA, the physical resource amount used by one distributed virtual resource block DVRB is equal to one physical resource block PRB (Non-patent Document 2).

  As a multiplexing method of the distributed virtual resource block DVRB in the distributed physical resource block DPRB (hereinafter referred to as “distributed virtual resource block DVRB mapping”), a time multiplexing method is used (Non-patent Documents 3 and 4). FIG. 17 is a diagram for explaining distributed virtual resource block DVRB mapping when the multiplexing number Nd is 2. Here, the downlink control channel is arranged in the first to third OFDM symbols in the distributed physical resource block DPRB excluding the resource element in which the downlink pilot channel is arranged, and the downlink shared data channel is the fourth. A case where four pilot antenna downlink pilot channels are arranged in the 14th OFDM symbol from the beginning will be described.

  When the multiplexing number Nd is 2, the distributed virtual resource blocks DVRB1 and DVRB2 are arranged in the same distributed physical resource block DPRB (DPRB1 and DPRB2). When the multiplexing number Nd is 2, slot-based hopping is used for time multiplexing of the signals of the distributed virtual resource blocks DVRB1 and DVRB2. The signal of the distributed virtual resource block DVRB1 includes the fourth to seventh OFDM symbols that are the downlink shared data channel portion of the first slot of the distributed physical resource block DPRB1, and the second slot of the distributed physical resource block DPRB2. Arranged in the 8th to 14th OFDM symbols which are downlink shared data channel portions.

  The signal of the distributed virtual resource block DVRB2 includes the fourth to seventh OFDM symbols that are the downlink shared data channel portion of the first slot of the distributed physical resource block DPRB2, and the second slot of the distributed physical resource block DPRB1. Arranged in the 8th to 14th OFDM symbols which are downlink shared data channel portions. That is, when the multiplexing number Nd is 2, the signal of the distributed virtual resource block DVRB includes the first slot of one distributed physical resource block DPRB and the second slot different from the previous one in the other distributed physical resource block DPRB. Placed in.

  FIG. 18 is a diagram illustrating distributed virtual resource block DVRB mapping when the multiplexing number Nd is 3. Here, in the distributed physical resource blocks DPRB1, DPRB2, and DPRB3, the downlink control channel is arranged in the first to third OFDM symbols, and the downlink shared data channel is arranged in the fourth to fourteenth OFDM symbols. A case where a downlink pilot channel of one transmission antenna is arranged will be described. When the multiplexing number Nd is 3, the distributed virtual resource blocks DVRB1, DVRB2, and DVRB3 are arranged in the same distributed physical resource block DPRB (DPRB1, DPRB2, and DPRB3).

  When the multiplexing number Nd is 3, OFDM symbol-based hopping is used for time multiplexing of the distributed virtual resource blocks DVRB1, DVRB2, and DVRB3. The signals of the distributed virtual resource block DVRB1 are the fourth, seventh, tenth and thirteenth OFDM symbols of the distributed physical resource block DPRB1, the sixth, ninth and twelfth OFDM symbols of the distributed physical resource block DPRB2, Arranged in the fifth, eighth, eleventh and fourteenth OFDM symbols of the distributed physical resource block DPRB3.

  The signals of the distributed virtual resource block DVRB2 are the fourth, seventh, tenth and thirteenth OFDM symbols of the distributed physical resource block DPRB2, the sixth, ninth and twelfth OFDM symbols of the distributed physical resource block DPRB3, Arranged in the fifth, eighth, eleventh and fourteenth OFDM symbols of the distributed physical resource block DPRB1.

  The signals of the distributed virtual resource block DVRB3 are the fourth, seventh, tenth and thirteenth OFDM symbols of the distributed physical resource block DPRB3, the sixth, ninth and twelfth OFDM symbols of the distributed physical resource block DPRB1, Arranged in the fifth, eighth, eleventh and fourteenth OFDM symbols of the distributed physical resource block DPRB2. That is, when the multiplexing number Nd is 3, the distributed virtual resource block DVRB has signals arranged at intervals of 3 OFDM symbols within the distributed physical resource block DPRB, and signals are transmitted at different OFDM symbols from 3 OFDM symbols at different distributed physical resource blocks DPRB. Be placed.

  In the distributed virtual resource block DVRB mapping as described above, as the radio resource allocation information used by the base station apparatus to allocate the distributed virtual resource block DVRB to the mobile station apparatus, it is continuous with the DVRB number (Starting VRB number) to be allocated first. Thus, the number of DVRBs to be allocated (Number of consecutive VRBs) is configured in the downlink control channel, and is notified from the base station apparatus to the mobile station apparatus (Non-patent Document 5).

  FIG. 19 shows an example of the distributed virtual resource block DVRB used in the base station apparatus and the mobile station apparatus. Here, a case where 15 virtual resource blocks VRB are configured and all of them are used as distributed virtual resource blocks DVRB will be described. For example, the base station apparatus indicates the number of the distributed virtual resource block DVRB5 as the first allocated DVRB number (Starting VRB number), and the radio resource allocation information indicating 2 as the number of continuously allocated DVRBs (Number of consecutive VRBs), A certain mobile station apparatus is notified. The mobile station apparatus notified of this radio resource allocation information recognizes that the distributed virtual resource blocks DVRB5 and DVRB6 have been allocated.

  Non-Patent Document 6 and Non-Patent Document 7 describe a method of associating a distributed virtual resource block DVRB and a physical resource block PRB pair in such distributed virtual resource block DVRB mapping and radio resource allocation information. That is, Non-Patent Document 6 and Non-Patent Document 7 describe which physical resource block PRB in the distributed virtual resource block DVRB is associated as the distributed physical resource block DPRB. When the multiplexing number Nd = 2, one distributed virtual resource block DVRB is arranged in two physical resource block PRB pairs.

  FIG. 20 shows the association between the distributed virtual resource block DVRB and the physical resource block PRB pair when the multiplexing number Nd = 2 described in Non-Patent Document 6. Here, a case where 15 physical resource blocks PRB are configured in the system bandwidth is shown. In Non-Patent Document 6, the distributed virtual resource block DVRB number is associated in order from the physical resource block PRB number at the end of the system bandwidth. First, in a certain physical resource block PRB pair, the distributed virtual resource block DVRB number is associated with the first slot and then associated with the second slot. In the association method according to Non-Patent Document 6, the other physical resource block PRB pair in which the signal of the same distributed virtual resource block DVRB is arranged is a physical resource located in a line-symmetric position with the center of the system bandwidth as an axis. Block PRB pair. (Hereinafter, this association method according to Non-Patent Document 6 will be referred to as “DVRB-to-PRB mapping A” for the sake of simplicity).

  Therefore, as shown in FIG. 20, in the DVRB-to-PRB mapping A described in Non-Patent Document 6, there is PRB1 which is the lowest frequency physical resource block PRB pair and the highest frequency physical resource block PRB pair. The distributed virtual source blocks DVRB1 and DVRB2 are associated with the PRB 15. Further, the distributed virtual source blocks DVRB3 and DVRB4 are associated with PRB2 which is a physical resource block PRB pair adjacent to the high frequency side of PRB1 and PRB14 which is a physical resource block PRB pair adjacent to the low frequency side of PRB15. ing. Similarly, the physical resource block PRB pair and the distributed virtual source block DVRB are associated with each other until the physical resource block PRB pair (PRB7) at the center of the system bandwidth is reached.

  FIG. 21 shows the association between the distributed virtual resource block DVRB and the physical resource block PRB pair when the multiplexing number Nd = 2 described in Non-Patent Document 7. Here, a case where 15 physical resource blocks PRB are configured in the system bandwidth is shown. In Non-Patent Document 7, association is performed in order from the physical resource block PRB number at the end of the system bandwidth of the first slot to the distributed virtual resource block DVRB number, and then association is performed in the second slot. In the association method according to Non-Patent Document 7, another physical resource block PRB pair in which signals of the same distributed virtual resource block DVRB are arranged is a physical resource block in which a fixed number of physical resource blocks PRB are separated in the frequency direction. It is a PRB pair. This fixed number is a value obtained by dividing the number of physical resource blocks PRB configured in the system bandwidth by half. (Hereinafter, the association method according to Non-Patent Document 7 will be referred to as “DVRB-to-PRB mapping B” for the sake of simplification of description).

Therefore, as shown in FIG. 21, in the DVRB-to-PRB mapping B described in Non-Patent Document 7, PRB1 which is the lowest frequency physical resource block PRB pair and a fixed number (15 / 2≈8) from this PRB1 ) Distributed virtual source blocks DVRB1 and DVRB8 are associated with PRB9 which is a separated physical resource block PRB pair. Furthermore, the distributed virtual source blocks DVRB2 and DVRB9 are associated with PRB2 which is a physical resource block PRB pair adjacent to the high frequency side of PRB1 and PRB10 which is a physical resource block PRB pair which is a fixed number (8) away from PRB2. It has been. Similarly, the physical resource block PRB pair and the distributed virtual source block are associated with each other until the physical resource block PRB pair (PRB7) at the center of the system bandwidth is reached.
3GPP TS 36.211-v2.0.0 (2007-09), Physical Channels and Modulation (Release 8) 3GPP TSG RAN1 # 49b, Orlando, Florida-USA, 25-29 June, 2007 R1-072646 “Draft Report of 3GPP TSG RAN WG1 # 49 v0.4.0” 3GPP TSG RAN1 # 50, Athens, Greece, 20-24 August, 2007, R1-073887 “Proposed way forward on distributed DL transmission” 3GPP TSG RAN1 # 50bis, Shanghai, China, 8-12 October, 2007, R1-0774019 “Downlink VRB email reflector summary” 3GPP TSG RAN1 # 51, Jeju, South Korea, 5-9 November, 2007 “Draft Report of 3GPP TSG RAN WG1 # 51 v0.1.0” 3GPP TSG RAN1 # 51, Jeju, South Korea, 5-9 November, 2007, R1-074920 “DVRB-pair to PRB-pair assignment and signaling” 3GPP TSG RAN1 # 51, Jeju, South Korea, 5-9 November, 2007, R1-074722 “DL Distributed Resource Signaling for EUTRA”

A physical resource block PRB pair used for the distributed virtual resource block DVRB can achieve a larger frequency diversity effect if it is configured by two physical resource blocks PRB having a frequency interval apart.
However, in the association between the distributed virtual resource block DVRB and the physical resource block PRB by the DVRB-to-PRB mapping A, two physical resource blocks PRB (frequency between the two physical resource blocks PRB) close to each end of the system bandwidth are used. A mobile station apparatus to which a distributed virtual resource block DVRB (for example, DVRB1 in FIG. 20) associated with an interval of 14PRB is assigned has a large frequency interval between physical resource blocks PRB, and thus obtains a large frequency diversity effect. However, a distributed virtual resource block DVRB (for example, DVRB14 in FIG. 20) associated with a physical resource block PRB close to the center of the system bandwidth (a frequency interval between two physical resource blocks PRB is 2 PRB) is associated. There is a problem that the mobile station device assigned can not get large frequency diversity effect.

  Further, in the association by DVRB-to-PRB mapping B, the frequency interval of the physical resource block PRB to which each distributed virtual resource block DVRB is allocated is the same for any distributed virtual resource block (in FIG. 21, two physical resources The frequency interval between the blocks PRB is 8PRB.), DVRB-to-PRB mapping A can always obtain a larger frequency diversity effect than when a physical resource block PRB close to the center of the system bandwidth is allocated. There is a problem that it is not possible to obtain a larger frequency diversity effect than when physical resource blocks PRB close to the end of the system bandwidth are associated with -to-PRB mapping A.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a radio communication system, a radio communication apparatus, a radio reception method, and a radio transmission method that can obtain an excellent frequency diversity effect. is there.

  The present invention has been made to solve the above-described problems, and a wireless communication system according to the present invention divides a plurality of first wireless communication devices and wireless resources by a predetermined width in a frequency direction and a time direction. From a signal of data addressed to the first wireless communication device having a data amount that can be transmitted in a physical resource allocation unit that is a region that is an allocation unit of data to be transmitted to the first wireless communication device. In the wireless communication system comprising: a second wireless communication apparatus that performs distributed transmission by dividing a virtual resource allocation unit and performing transmission by allocating and transmitting to the plurality of physical resource allocation units distributed in the frequency direction. The wireless communication device is a combination of the physical resource allocation units to which the virtual resource allocation unit is allocated and a rule of order, and a plurality of preset rules. A resource association unit that selects one rule from the rules, and uses the selected rule to determine the physical resource allocation unit to allocate a virtual resource allocation unit addressed to the first wireless communication device; The information indicating the rule selected by the associating unit and the physical resource allocation unit to which the virtual resource allocation unit destined for the first wireless communication apparatus determined by the associating unit is set as the start position and the number of virtual resource allocation units. An allocation information generating unit that generates radio resource allocation information including at least information represented by: and a multiplexing unit that multiplexes the radio resource allocation information with a signal to be transmitted to the first radio communication device, The first radio communication device extracts the radio resource allocation information from the received signal, and based on the radio resource allocation information, the received signal A demultiplexing unit that extracts a signal of the virtual resource allocation unit from the physical resource allocation unit to which the virtual resource allocation unit addressed to the first wireless communication apparatus is allocated. It is characterized by.

  Thus, the wireless communication system selects a rule from among a plurality of preset rules that are combinations and orders of physical resource allocation units to which virtual resource allocation units are allocated. By selecting a rule that increases the frequency interval of the combination of physical resource allocation units to which units are allocated, an excellent frequency diversity effect can be obtained.

  The wireless communication system of the present invention is the above-described wireless communication system, wherein the resource association unit uses the rule selected from the plurality of preset rules, An allocation unit is allocated to two physical resource allocation units, and the plurality of preset rules are that the two physical resource allocation units that allocate one virtual resource allocation unit are transmissions of the second radio communication apparatus. A first rule having a line-symmetrical positional relationship with respect to the center of the bandwidth, and a second rule in which a frequency interval between the two physical resource allocation units is half of a transmission bandwidth of the second wireless communication device It is characterized by including.

  As a result, the wireless communication system selects the first rule when the frequency interval of the combination of physical resource allocation units to which the virtual resource allocation unit is allocated becomes larger in the first rule, On the other hand, when the frequency interval of the combination of physical resource allocation units to which the virtual resource allocation unit is allocated becomes larger, the frequency interval of the combination of physical resource allocation units to which the virtual resource allocation unit is allocated is selected by selecting the second rule. Since it becomes large, an excellent frequency diversity effect can be obtained.

  The wireless communication system of the present invention is the above-described wireless communication system, wherein the resource association unit uses the rule selected from the plurality of preset rules, An allocation unit is allocated to two physical resource allocation units, and the multiplexing unit is configured to transmit a signal of the one virtual resource allocation unit in an area obtained by dividing each of the two physical resource allocation units into two in the time direction. And assigning to two areas of different time areas.

  The wireless communication system of the present invention is the above-described wireless communication system, wherein the first rule preferentially allocates physical resource allocation units close to both ends of the transmission bandwidth of the second wireless communication device. It is characterized by that.

  As a result, when the first rule is selected, the wireless communication system is allocated from the combination of the physical resource allocation units to which the virtual resource allocation unit is allocated in ascending frequency interval, so that an excellent frequency diversity effect can be obtained. it can.

  The radio communication system of the present invention is the radio communication system described above, wherein the resource association unit selects the one rule based on the number of virtual resource allocation units that perform distributed transmission. It is characterized by doing.

  As a result, the wireless communication system has the first rule when the number of virtual resource allocation units is such that the frequency interval of the combination of physical resource allocation units to which the virtual resource allocation unit is allocated becomes larger. When the number of virtual resource allocation units is such that the frequency interval of the combination of physical resource allocation units to which the virtual resource allocation unit is allocated is larger than the second rule, the second rule is selected. Thus, the frequency interval of the combination of physical resource allocation units to which the virtual resource allocation unit is allocated is increased, and an excellent frequency diversity effect can be obtained.

  The radio communication system of the present invention is the radio communication system described above, wherein the resource association unit determines the number of virtual resource allocation units that perform distributed transmission, The first rule is selected, and when it is determined that there are many, the second rule is selected.

  As a result, the wireless communication system reduces the first rule when the number of virtual resource allocation units is small and the frequency interval of the combination of physical resource allocation units in which the first rule allocates virtual resource allocation units is larger. When the frequency interval of the combination of the physical resource allocation units to which the virtual resource allocation unit is allocated and the number of virtual resource allocation units is large and the second rule is larger, the second rule is selected. The frequency interval of the combination of physical resource allocation units for allocating virtual resource allocation units is increased, and an excellent frequency diversity effect can be obtained.

  Also, the wireless communication system of the present invention is the above-described wireless communication system, wherein when the first rule is used, a frequency interval between the two physical resource allocation units to which one virtual resource allocation unit is allocated is the first frequency. When it is smaller than half of the transmission bandwidth of the second wireless communication apparatus, it is determined that the number of the virtual resource allocation units for performing distributed transmission is large, and otherwise, it is determined that the number is small.

  Accordingly, the wireless communication system determines that the number of virtual resource allocation units is small, and when the first rule is selected, the frequency interval of the combination of physical resource allocation units to which the virtual resource allocation unit is allocated is equal to the transmission bandwidth. When it is determined that the number of virtual resource allocation units is greater than half and the second rule is selected, the frequency interval of the combination of the physical resource allocation units to which the virtual resource allocation unit is allocated is half the transmission bandwidth. Therefore, the frequency interval of the combination of the physical resource allocation units to which the virtual resource allocation unit is allocated becomes half or larger than the transmission bandwidth, and an excellent frequency diversity effect can be obtained.

  The first wireless communication apparatus of the present invention is an area in which radio resources are divided by a predetermined width in the frequency direction and the time direction, and is an area serving as an allocation unit of data transmitted in the radio resources. A virtual resource allocation unit composed of a data signal of a data amount that can be transmitted in a physical resource allocation unit is divided, and a signal transmitted by being allocated to a plurality of physical resource allocation units distributed in the frequency direction is received. In the wireless communication apparatus, information indicating a rule of a combination and order of the physical resource allocation units to which the virtual resource allocation unit is allocated, the physical resource allocation unit to which the virtual resource allocation unit is allocated, and a start position of the virtual resource allocation unit Radio resource allocation information including at least information represented by a number from the received signal Based on the radio resource allocation information, the physical resource allocation unit in the received signal, from the physical resource allocation unit to which the virtual resource allocation unit addressed to the device is allocated, to the virtual resource allocation unit A demultiplexing unit for extracting a signal is provided.

  Also, the second wireless communication apparatus of the present invention is a physical resource allocation that is an area in which radio resources are divided by a predetermined width in the frequency direction and the time direction, and is an area that is a data allocation unit in the radio resources. A second wireless communication apparatus that performs distributed transmission in which a virtual resource allocation unit composed of a data signal having a data amount that can be transmitted in units is divided and allocated to a plurality of physical resource allocation units distributed in the frequency direction for transmission In the above, a rule of the combination and order of the physical resource allocation units to which the virtual resource allocation unit is allocated, selecting one rule from a plurality of preset rules, and using the selected rule, A resource association unit for determining the physical resource allocation unit to which the virtual resource allocation unit is allocated; and the resource association unit An allocation information generating unit that generates radio resource allocation information including at least information representing the selected rule and information representing the physical resource allocation unit to which the virtual resource allocation unit is allocated by the start position and the number of virtual resource allocation units And a multiplexing unit that multiplexes the radio resource allocation information with a signal to be transmitted.

  Also, the radio reception method of the present invention is an area in which radio resources are divided by a predetermined width in the frequency direction and the time direction, and is an area serving as an allocation unit of data to be transmitted in the radio resources. A first radio communication apparatus that divides a virtual resource allocation unit composed of data signals having a data amount that can be transmitted in units, and receives signals transmitted by being allocated to a plurality of physical resource allocation units distributed in the frequency direction In the wireless reception method according to claim 1, the first wireless communication apparatus assigns information indicating a rule of a combination and order of the physical resource allocation units to which the virtual resource allocation unit is allocated, and the physical resource allocation unit to which the virtual resource allocation unit is allocated. Including at least information representing the start position and number of virtual resource allocation units. A first step of extracting resource allocation information from the received signal, and the first radio communication device is the physical resource allocation unit in the received signal based on the radio resource allocation information, And a second step of extracting a signal of the virtual resource allocation unit from the physical resource allocation unit to which the virtual resource allocation unit addressed to the device is allocated.

  Also, the radio transmission method of the present invention is an area in which radio resources are divided by a predetermined width in the frequency direction and the time direction, and is a physical resource allocation unit that is an area for data allocation in radio resources. Wireless transmission in the second wireless communication apparatus that performs distributed transmission in which a virtual resource allocation unit composed of data signals of a transmittable data amount is divided and allocated to a plurality of physical resource allocation units distributed in the frequency direction for transmission In the method, the second wireless communication apparatus selects a rule from among a plurality of preset rules, which are rules and combinations of the physical resource allocation units to which the virtual resource allocation unit is allocated. The physical resource allocation unit to which the virtual resource allocation unit is allocated is determined using the selected rule. 1 process, information indicating the rule selected in the first process by the second wireless communication apparatus, and the physical resource allocation unit to which the virtual resource allocation unit is allocated. A second step of generating radio resource allocation information including at least information represented by a position and a number; and a third step of multiplexing the radio resource allocation information on a signal to be transmitted by the second radio communication device It is characterized by providing.

  According to the present invention, a rule for a combination and order of physical resource allocation units to which a virtual resource allocation unit is allocated, and one rule is selected from a plurality of preset rules. By selecting a rule that increases the frequency interval of the combination of physical resource allocation units to be allocated, an excellent frequency diversity effect can be obtained.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. The wireless communication system according to the present embodiment includes a base station device (second wireless communication device) 1, a plurality of mobile station devices (first wireless communication devices) 2 that receive signals transmitted by the base station device 1, and It comprises. The downlink of radio communication from the base station apparatus 1 to the mobile station apparatus 2 includes a downlink pilot channel, a downlink synchronization channel, a broadcast channel, a downlink control channel, a downlink shared data channel, a control format indicator channel, It consists of a downlink HARQ (Hybrid Automatic Repeat reQuest) indicator channel. Further, the uplink of radio communication from the mobile station apparatus 2 to the base station apparatus 1 includes an uplink pilot channel, a random access channel, an uplink control channel, and an uplink shared data channel.

  FIG. 1 is a diagram illustrating a schematic configuration of a downlink radio frame (radio resource) from the base station apparatus 1 to the mobile station apparatus 2 in the present embodiment. The horizontal axis represents the frequency domain, and the vertical axis represents the time domain. The downlink radio frame is a unit such as radio resource allocation to each mobile station device in localized transmission, and a PRB (Physical Resource Block) consisting of a frequency band and a time band of a predetermined width. Block) pair (physical resource allocation unit). Basically, one physical resource block PRB pair is composed of two physical resource blocks PRB that are continuous in the time domain.

  One physical resource block PRB is composed of 12 subcarriers in the frequency domain, and is composed of 7 OFDM symbols in the time domain. The system bandwidth is a communication bandwidth of the base station device 1. In the time domain, there are a slot composed of 7 OFDM symbols, a subframe composed of 2 slots, and a radio frame composed of 10 subframes. A unit composed of one subcarrier and one OFDM symbol is called a resource element. In the downlink radio frame, a plurality of physical resource blocks PRB are arranged according to the system bandwidth.

  In each subframe, at least a downlink shared data channel used for transmitting information data and a downlink control channel used for transmitting control data are arranged. Although the downlink pilot channel used for channel estimation of the downlink shared data channel and the downlink control channel is also arranged, it is not shown in FIG. In FIG. 1, the downlink control channel is arranged in the first, second, and third OFDM symbols of the subframe, and the downlink shared data channel is arranged in other OFDM symbols. The OFDM symbol in which the control channel is arranged varies in subframe units.

  Although not shown in FIG. 1, the control format indicator channel indicating the number of OFDM symbols constituting the downlink control channel is arranged at a predetermined frequency position of the first OFDM symbol, and the downlink control channel is 1 It is arranged only in the first OFDM symbol, or is arranged in the first and second OFDM symbols. Similarly, although not shown in FIG. 1, the downlink HARQ indicator channel is arranged over the first OFDM symbol or the first to third OFDM symbols, and the downlink HARQ indicator channel is assigned to the downlink HARQ indicator channel. The number of OFDM symbols to be arranged and the number of OFDM to arrange one downlink HARQ indicator channel are indicated by a broadcast channel. Note that the downlink control channel and the downlink shared data channel are not arranged together in the same OFDM symbol. In the downlink control channel, a mobile station identifier or a mobile station group identifier, radio resource allocation information of the downlink shared data channel, multi-antenna related information, modulation scheme, coding rate, payload size, retransmission parameter, and the like are arranged.

  The base station apparatus 1 according to the present embodiment divides a distributed virtual resource block DVRB (virtual resource allocation unit) addressed to the mobile station apparatus 2 and allocates it to a plurality of physical resource block PRB pairs distributed in the frequency direction for transmission. Send. Here, the distributed virtual resource block DVRB includes a data signal addressed to the mobile station apparatus 2 having a data amount that can be transmitted by the physical resource block PRB pair. Here, the physical resource block PRB pair is an area obtained by dividing a downlink radio frame by a predetermined width in the frequency direction and the time direction, that is, two physical resource blocks PRB continuous in the time direction. This area is an allocation unit of data to be transmitted to

  FIG. 2 is a schematic block diagram showing the configuration of the base station apparatus 1 in the embodiment of the present invention. As illustrated in FIG. 2, the base station apparatus 1 includes a radio resource control unit 11, a control unit 12, a transmission processing unit 13, and a reception processing unit 14. The radio resource control unit 11 manages intermittent transmission / reception cycles with the mobile station apparatus 2, modulation scheme / coding rate, transmission power, radio resource allocation, the number of OFDM symbols constituting a downlink control channel, multiplexing, and the like. Control information for instructing the contents is output to the control unit 12, and is notified as control data to the mobile station apparatus 2 through the control unit 12 and the transmission processing unit 13.

  The radio resource control unit 11 includes a resource association unit 15. The resource associating unit 15 selects a rule from a plurality of rules that are combinations and orders of physical resource block PRB pairs to which the distributed virtual resource block DVRB is allocated. Further, the resource association unit 15 determines a physical resource block PRB pair to which the distributed virtual resource block DVRB destined for the mobile station apparatus 2 is allocated using the selected rule. At this time, the resource association unit 15 assigns one distributed virtual resource block DVRB to two physical resource block PRB pairs, and in the case of multiplicity Nd2, one distributed virtual resource block DVRB is divided into three physical resource blocks. There are cases where the multiplicity Nd3 is assigned to the PRB pair, and details will be described in the description of FIG. 4 and FIG.

  The control unit 12 outputs a control signal to the transmission processing unit 13 and the reception processing unit 14 in order to control the transmission processing unit 13 and the reception processing unit 14 based on the control information input from the radio resource control unit 11. . The control unit 12 controls the transmission processing unit 13 and the reception, such as the modulation scheme of transmission / reception signals, the setting of the coding rate, the setting of the number of OFDM symbols constituting the downlink control channel, and the setting of the arrangement of each channel in the resource element. This is performed on the processing unit 14. In addition, the control unit 12 generates control data to be arranged in the downlink control channel, and instructs the transmission processing unit 13 to perform transmission. Further, the control unit 12 generates control data to be arranged in the downlink shared data channel instead of the downlink control channel, and instructs the transmission processing unit 13 to perform transmission as data together with information data.

  Further, the control unit 12 includes an allocation information generation unit 16. The allocation information generation unit 16 displays information (flag) indicating the rule selected by the resource association unit 15 and the distributed virtual resource block DVRB addressed to the mobile station apparatus 2 as a start position (Starting VRB number) (Starting VRB number) ( Radio resource allocation information including at least information expressed by VRB start position) and number (Number of Consective VRBs) (number of VRBs), and including the radio resource allocation information in control data transmitted on the downlink control channel, The data is output to the transmission processing unit 13.

  Based on the input from the control unit 12, the transmission processing unit 13 generates a downlink control channel, a downlink shared data channel, a downlink pilot channel, and a control format indicator channel, multiplexes each channel into a downlink frame, For example, it transmits to each mobile station apparatus 2 via four transmission antennas. In addition, since it is not directly related to the present invention, the description of the processing regarding the broadcast channel, the downlink synchronization channel, and the downlink HARQ indicator channel is omitted.

  Based on the input from the control unit 12, the reception processing unit 14 receives the uplink control channel, the uplink shared data channel, the uplink pilot channel, and the random access channel transmitted by each mobile station apparatus 2 via the reception antenna. Do. In addition, since there is no direct relation with this invention, description of the process (reception processing part) regarding an uplink is abbreviate | omitted.

  FIG. 3 is a schematic block diagram illustrating an internal configuration of the transmission processing unit 13 of the base station device 1 in the present embodiment. The transmission processing unit 13 of the base station apparatus 1 includes a plurality of downlink shared data channel processing units 100, a plurality of downlink control channel processing units 110, a reference signal (downlink pilot channel) generation unit 120, and a control format indicator. A signal generation unit 130, a multiplexing unit 140, and a transmission processing unit 150 for each antenna are provided for each transmission antenna. The plurality of downlink shared data channel processing units 100, the plurality of downlink control channel processing units 110, and the per-antenna transmission processing unit 150 for each transmission antenna have the same configuration and function, and therefore one of them will be described as a representative. .

  The downlink shared data channel processing unit 100 performs processing of the downlink shared data channel, that is, each downlink shared data channel processing unit 110 receives the information data addressed to any one of the mobile station apparatuses 2, and A signal of the distributed virtual resource block DVRB addressed to the mobile station apparatus 2 is generated. The downlink shared data channel processing unit 100 includes a turbo coding unit 101 and a data modulation unit 102.

  The downlink control channel processing unit 110 performs processing of the downlink control channel. That is, each downlink control channel processing unit 110 receives control data addressed to any one of the mobile station devices 2 and receives the mobile station. A signal including information related to radio resource allocation of the distributed virtual resource block DVRB addressed to the device 2 is generated. The downlink control channel processing unit 110 includes a convolutional code unit 111 and a QPSK modulation unit 112.

  The transmission processing unit 150 for each transmission antenna transmits the signal multiplexed by the multiplexing unit 140 for each transmission antenna via each transmission antenna. The transmission processing unit 150 for each transmission antenna includes an IFFT (Inverse Fast Fourier Transform) unit 151, a GI (Guard Interval) insertion unit 152, a D / A (digital / analog conversion) unit 153, And a transmission RF (Radio Frequency) unit 154.

  Each of the plurality of downlink shared data channel processing units 100 transmits information data and control data input from the control unit 12 (hereinafter referred to as “data” together with the information data and the control data) in the OFDM scheme. Perform baseband processing. The turbo coding unit 101 performs error correction coding using a turbo code to increase error resistance of input data in accordance with the coding rate instruction from the control unit 12. The data modulation unit 102 includes QPSK (Quadrature Phase Shift Keying), 16QAM (16 Quadrature Amplitude Modulation), 64QAM (64 Quadrature Amplitude Modulation value such as 64 Quadrature Amplitude Modulation value). Of the modulation schemes, the data that has been subjected to error correction coding by the turbo coding unit 101 is modulated by a modulation scheme instructed by the control unit 12.

  Each of the plurality of downlink control channel processing units 110 performs baseband processing for transmitting control data in the OFDM scheme. The convolutional code unit 111 performs error correction coding using a convolutional code for increasing the error tolerance of the control data input from the control unit 12. The QPSK modulation unit 112 modulates the control data that has been subjected to error correction coding by the convolutional coding unit 111 using the QPSK modulation method. The reference signal generation unit 120 generates a reference signal to be transmitted by each transmission antenna of the base station apparatus 1 using the downlink pilot channel. The control format indicator signal generation unit 130 generates a control format indicator signal for transmitting information indicating OFDM symbols constituting the downlink control channel through the control format indicator channel.

  Based on the control signal from the control unit 12, the multiplexing unit 140 outputs a transmission signal of data addressed to each mobile station apparatus 2 processed by the downlink shared data channel processing unit 100, such as encoding and modulation, and the downlink A transmission signal of control data processed by encoding and modulation output from the link control channel processing unit 110, a control format indicator signal, and a reference signal are arranged in a resource element for each transmission antenna.

  The multiplexing unit 140 uses slot-based hopping (Slot) when the multiplexing number Nd is 2 for signal allocation to the resource elements in the physical resource block PRB of the downlink shared data channel constituting the signal of the distributed virtual resource block DVRB. -Based hopping), and when the multiplexing number Nd is 3, OFDM symbol-based hopping is used. These two signal arrangements will be described in detail in the description of FIG. 4 and FIG. The association between the physical resource block PRB pair and the distributed virtual resource block DVRB is determined by the radio resource control unit 11 and is based on the control information related to the association input via the control unit 12 and the distributed virtual resource block DVRB number. Thus, the multiplexing unit 140 arranges the signal of the distributed virtual resource block DVRB in the physical resource block PRB.

  The IFFT unit 151 performs high-speed inverse Fourier transform on the signal input from the multiplexing unit 140 and performs OFDM modulation. The GI insertion unit 152 generates a baseband digital signal as a symbol in the OFDM scheme by adding a guard interval to the OFDM-modulated signal. The guard interval is obtained by a known method of duplicating a part of the beginning or end of a symbol to be transmitted. The D / A unit 153 converts the baseband digital signal input from the GI insertion unit 112 into an analog signal.

  The transmission RF unit 154 generates an in-phase component and a quadrature component of the intermediate frequency from the analog signal input from the D / A unit 153, removes excess frequency components for the intermediate frequency band, and converts the intermediate frequency signal to a high frequency. The signal is converted (up-converted) into the above signal, excess frequency components are removed, power is amplified, and the signal is output to one of the transmission antennas. The base station apparatus 1 includes the transmission processing units 150 for each antenna by the number of transmission antennas used for transmission, that is, four in this embodiment, and the transmission processing unit 150 for each antenna is output by the multiplexing unit 140. Process the signal for each transmit antenna.

  FIG. 4 is a diagram for explaining slot-based hopping used for signal arrangement of the distributed virtual resource block DVRB when the multiplexing number Nd is two. Here, the multiplexing unit 140 arranges the downlink control channel in the first to third OFDM symbols in the distributed physical resource block DPRB excluding the resource element in which the downlink pilot channel is arranged, and downlink sharing A case will be described in which data channels are arranged in the 4th to 14th OFDM symbols and downlink pilot channels R1, R2, R3, R4 of 4 transmission antennas are arranged.

  When the multiplexing number Nd is 2, the distributed virtual resource blocks DVRB1 and DVRB2 are arranged in the same distributed physical resource block DPRB (DPRB1 and DPRB2). When the multiplexing number Nd is 2, slot-based hopping is used for time multiplexing of the signals of the distributed virtual resource blocks DVRB1 and DVRB2.

  The signal of the distributed virtual resource block DVRB1 is a downlink shared data channel portion of the first slot of the distributed physical resource block DPRB1 except for the resource element in which the downlink pilot channels R1, R2, R3, R4 are arranged 4 The multiplexing unit 140 arranges the 8th to 7th OFDM symbols and the 8th to 14th OFDM symbols which are the downlink shared data channel portions of the second slot of the distributed physical resource block DPRB2. That is, the multiplexing unit 140 uses different time regions from among the regions obtained by dividing the signal of one distributed virtual resource block DVRB into two in the time direction, each of two physical resource block PRB pairs at the boundary of the physical resource block PRB. The two areas are assigned.

  The signal of the distributed virtual resource block DVRB2 is a downlink shared data channel portion of the first slot of the distributed physical resource block DPRB2, excluding resource elements in which the downlink pilot channels R1, R2, R3, and R4 are arranged 4 Are arranged in the 8th to 14th OFDM symbols which are the downlink shared data channel part of the 2nd slot of the distributed physical resource block DPRB1. That is, when the multiplexing number Nd is 2, the signal of the distributed virtual resource block DVRB includes the first slot of one distributed physical resource block DPRB and the second slot different from the previous one in the other distributed physical resource block DPRB. Placed in.

  FIG. 5 is a diagram for explaining OFDM symbol base hopping used for signal arrangement of the distributed virtual resource block DVRB when the multiplexing number Nd is 3. Here, in the distributed physical resource blocks DPRB1, DPRB2, and DPRB3, the downlink control channel is arranged in the first to third OFDM symbols, and the downlink shared data channel is arranged in the fourth to fourteenth OFDM symbols. A case where a downlink pilot channel of one transmission antenna is arranged will be described. When the multiplexing number Nd is 3, the distributed virtual resource blocks DVRB1, DVRB2, and DVRB3 are arranged in the same distributed physical resource block DPRB (DPRB1, DPRB2, and DPRB3).

  When the multiplexing number Nd is 3, OFDM symbol-based hopping is used for time multiplexing of the distributed virtual resource blocks DVRB1, DVRB2, and DVRB3. The signals of the distributed virtual resource block DVRB1 are the fourth, seventh, tenth and thirteenth OFDM symbols of the distributed physical resource block DPRB1, the sixth, ninth and twelfth OFDM symbols of the distributed physical resource block DPRB2, Arranged in the fifth, eighth, eleventh and fourteenth OFDM symbols of the distributed physical resource block DPRB3.

  The signals of the distributed virtual resource block DVRB2 are the fourth, seventh, tenth and thirteenth OFDM symbols of the distributed physical resource block DPRB2, the sixth, ninth and twelfth OFDM symbols of the distributed physical resource block DPRB3, Arranged in the fifth, eighth, eleventh and fourteenth OFDM symbols of the distributed physical resource block DPRB1.

  The signals of the distributed virtual resource block DVRB3 are the fourth, seventh, tenth and thirteenth OFDM symbols of the distributed physical resource block DPRB3, the sixth, ninth and twelfth OFDM symbols of the distributed physical resource block DPRB1, Arranged in the fifth, eighth, eleventh and fourteenth OFDM symbols of the distributed physical resource block DPRB2. That is, when the multiplexing number Nd is 3, the distributed virtual resource block DVRB has signals arranged at intervals of 3 OFDM symbols within the distributed physical resource block DPRB, and signals are transmitted at different OFDM symbols from 3 OFDM symbols at different distributed physical resource blocks DPRB. Be placed.

  FIG. 6 is a schematic block diagram showing the configuration of the mobile station apparatus 2 in the present embodiment. As illustrated in FIG. 6, the mobile station device 2 includes a control unit 21, a transmission processing unit 22, and a reception processing unit 23. The reception processing unit 23 performs reception processing on the downlink control channel, the downlink shared data channel, the downlink pilot channel, and the control format indicator channel received from the base station apparatus 2 via the reception antenna.

  The control unit 21 controls the transmission processing unit 22 and the reception processing unit 23 based on the control data notified from the base station apparatus 1 using the downlink control channel and the downlink shared data channel. Further, the control unit 21 notifies the distributed virtual resource block DVRB mapping radio resource allocation information notified from the base station apparatus 1 (a flag indicating the association between a DVRB and a PRB pair, a VRB start position (Starting VRB number), the number of VRBs ( Number of continuity VRBs), based on the control format indicator, the resource element in which the signal distributed and transmitted to the mobile station apparatus 2 is detected is detected, and the control signal for extracting the received signal is sent to the reception processing unit 23 Output. A method for detecting a resource element in which a signal distributed and transmitted to the mobile station apparatus 2 is arranged will be described later.

  Based on the input from the control unit 21, the transmission processing unit 22 performs transmission of the uplink control channel, the uplink shared data channel, the uplink pilot channel, and the random access channel via the transmission antenna. In addition, since it is not directly related to the present invention, the details of the processing related to the uplink by the transmission processing unit 22 are omitted.

  FIG. 7 is a schematic block diagram showing an internal configuration of the reception processing unit 23 of the mobile station apparatus 2 in the present embodiment. The reception processing unit 23 of the mobile station apparatus 2 includes a reception RF unit 201, an A / D unit 202, a GI removal unit 203, an FFT unit 204, a demultiplexing unit 205, a propagation path estimation unit 206, a propagation path Compensator 207, control format indicator detector 208, propagation path compensation section 209, data demodulation section 210, turbo decoding section 211, propagation path compensation section 212, QPSK demodulation section 213, and Viterbi decoder section 214 It comprises. In the present embodiment, the reception RF unit 201, the A / D unit 202, the GI removal unit 203, and the FFT unit 204 function as a reception unit.

  The reception RF unit 201 amplifies the signal received via the reception antenna, converts it to an intermediate frequency (down-conversion), removes unnecessary frequency components, and controls the amplification level so that the signal level is properly maintained. Then, quadrature demodulation is performed based on the in-phase component and the quadrature component of the received signal. The A / D unit 202 converts the analog signal orthogonally demodulated by the reception RF unit 201 into a digital signal. The GI removal unit 203 removes a portion corresponding to the guard interval from the digital signal output from the A / D unit 202. The FFT unit 204 performs fast Fourier transform on the signal input from the GI removal unit 203 and performs demodulation of the OFDM scheme.

  Based on an instruction from the control unit 21, the demultiplexing unit 205 performs a Fourier transform by the FFT unit 204, that is, a downlink pilot channel, a control format indicator channel, a downlink shared data channel, a received signal demodulated by the OFDM method, A downlink control channel is extracted from the allocated resource elements and output. Specifically, the demultiplexing unit 205 extracts the downlink pilot channel and the control format indicator channel having a fixed arrangement, outputs the downlink pilot channel to the propagation path estimation unit 206, and the control format indicator channel is propagated. Output to the path compensation unit 207. Further, the demultiplexing unit 205 is input via the control unit 21 based on information representing a resource element in which the downlink control channel included in the control format indicator channel previously output to the propagation path compensation unit 207 is arranged. Then, the downlink control channel including the radio resource allocation information is extracted and output to the propagation path compensation unit 212.

  Further, the demultiplexing unit 205 extracts the downlink shared data channel based on the radio resource allocation information included in the downlink control channel that is input via the control unit 21 and previously output to the propagation path compensation unit 212. To the propagation path compensation unit 209. At this time, the demultiplexing unit 205 performs signal allocation by the multiplexing unit 140 of the base station apparatus 1 from the distributed multiplexed downlink shared data channel, that is, the signal multiplexed on the downlink shared data channel of the physical resource block PRB. Based on the radio resource allocation information including information on the distributed virtual resource block DVRB mapping to be expressed, a signal of the distributed virtual resource block addressed to the mobile station apparatus 2 is extracted. This extraction method (a method for detecting a resource element in which a signal of the distributed virtual resource block DVRB is arranged) will be described later.

  The propagation path estimation unit 206 estimates propagation path fluctuations for each transmission antenna of the base station apparatus 1 based on the reception result of the known reference signal arranged in the downlink pilot channel separated by the demultiplexing unit 205, and the propagation path Outputs compensation value. Based on the propagation path fluctuation compensation value from propagation path estimation section 206, propagation path compensation section 207 compensates for propagation path fluctuation of the signal of the control format indicator channel input from demultiplexing section 205. The control format indicator detection unit 208 detects information of the control format indicator indicating the number of OFDM symbols constituting the downlink control channel from the signal arranged in the control format indicator channel for which propagation path variation compensation has been performed, and performs control. To the unit 21.

  Based on the propagation path fluctuation compensation value from the propagation path estimation section 206, the propagation path compensation section 209 compensates for the propagation path fluctuation of the downlink shared data channel signal input from the demultiplexing section 205. The data demodulator 210 demodulates the downlink shared data channel in which propagation path fluctuation is compensated by the propagation path compensation unit 209. This demodulation is performed corresponding to the modulation scheme used in the data modulation section 102 of the base station apparatus 1, and this modulation scheme is instructed from the control section 21 based on information included in the downlink control channel. The turbo decoding unit 211 decodes the downlink shared data channel demodulated by the data demodulation unit 210. This decoding is performed corresponding to the coding rate used in the turbo coding unit 101 of the base station apparatus 1, and this coding rate is instructed by the control unit 21 based on information included in the downlink control channel. .

  Based on the propagation path fluctuation compensation value from the propagation path estimation section 206, the propagation path compensation section 212 compensates for the propagation path fluctuation of the downlink control channel signal input from the demultiplexing section 205. The QPSK demodulator 213 performs QPSK demodulation of the downlink control channel in which propagation path fluctuation is compensated by the propagation path compensation unit 212. The Viterbi decoder 214 decodes the downlink control channel demodulated by the QPSK demodulator 213. Control data configured in the downlink control channel decoded by the Viterbi decoder unit 214 is input to the control unit 21. The control unit 21 outputs a control signal to the demultiplexing unit 205 based on the radio resource allocation information including information related to the distributed virtual resource block DVRB mapping, and outputs a control signal to the data demodulation unit 210 based on the information related to the modulation scheme. Then, a control signal is output to the turbo decoding unit 211 based on the information regarding the coding rate.

  FIG. 8 is a diagram showing a format of radio resource allocation information for distributed virtual resource block DVRB mapping in the present embodiment. As shown in FIG. 8, the radio resource allocation information of the distributed virtual resource block DVRB includes at least a flag indicating the association between the DVRB and the PRB pair, a VRB start position (Starting VRB number), and the number of VRBs (Number of consecutive VRBs). Is done.

  The flag indicating the association between the DVRB and the PRB pair indicates the combination of the physical resource block PRB pair to which the distributed virtual resource block DVRB is allocated and the order rule type. This flag is composed of, for example, 1 bit, and flag = “0” is a physical resource block PRB pair having a line-symmetrical positional relationship with respect to the center of the system band in order from the both ends of the system band toward the center of the system band. A DVRB-to-PRB mapping A (first rule) assigned to the distributed virtual resource block DVRB in pairs is shown. Flag = “1” is a DVRB− that is assigned to the distributed virtual resource block DVRB as a pair of physical resource block PRB pairs with a frequency interval of half the system bandwidth in order from the lowest to the highest system band frequency. The to-PRB mapping B (second rule) is shown. The VRB start position indicates the first distributed virtual resource block DVRB number assigned to the mobile station apparatus 2.

  As shown in FIG. 9, when 15 distributed virtual resource blocks DVRB are configured in the system bandwidth, the VRB start position is configured by 4 bits (16 states). The number of VRBs indicates the number of distributed virtual resource blocks DVRB allocated continuously. For example, in a wireless communication system, when the number of distributed virtual resource blocks DVRB to be continuously allocated to one mobile station apparatus 2 in the frequency direction is up to two, the number of VRBs is configured by 1 bit (two states). . When the number of DVRBs to be continuously allocated in the radio communication system is 1, the number of VRBs is not necessary and may not be included in the radio resource allocation information.

  The base station apparatus 1 controls the association between the distributed virtual resource block DVRB and the physical resource block PRB pair according to the number of physical resource blocks PRB configured in the system bandwidth and the number of distributed virtual resource blocks DVRB to be allocated at the same time. Is used to notify the mobile station apparatus 1. A control example using the flag of the base station apparatus 1 will be described with reference to FIGS. 9, 10, and 11.

  When the number of distributed virtual resource blocks DVRB to be allocated at the same time is small, the base station apparatus 1 uses DVRB-to-PRB mapping A that allocates the distributed virtual resource block DVRB to the physical resource block PRB pair as shown in FIG. FIG. 10 shows frequency assigned to the first slot and the second slot of each of the physical resource block PRB pairs PRB1 to PRB15 arranged over the system band from the low frequency to the high frequency on the horizontal axis. The distributed virtual resource blocks DVRB and their order are indicated by symbols DVRB1 to DVRB14. In DVRB-to-PRB mapping A, as shown in FIG. 10, the base station apparatus 1 gives priority to the distributed virtual resource block DVRB basically associated with the physical resource block PRB pair at the end of the system bandwidth. Use.

  That is, DVRB1, which is the first distributed virtual resource block DVRB used, is the first slot of PRB1, which is the physical resource block PRB pair with the lowest frequency, and PRB15, which is the physical resource block PRB pair with the highest frequency. The distributed virtual resource block DVRB2 allocated to the second slot and used second is DVRB2, and the second resource slot PRB1, which is the physical resource block PRB pair having the lowest frequency, and the physical resource block PRB having the highest frequency are used. It is assigned to the first slot of the PRB 15 as a pair.

  The next third distributed virtual resource block DVRB DVRB3 used is the first slot of PRB2, which is the physical resource block PRB pair adjacent to the high frequency side of PRB1, which is the physical resource block PRB pair having the lowest frequency, DVRB2 which is a distributed virtual resource block DVRB which is allocated to the second slot of PRB14 which is the physical resource block PRB pair adjacent to the low frequency side of PRB15 which is the physical resource block PRB pair having the highest frequency and which is used fourth. Are assigned to the second slot of PRB2, which is the second lowest frequency physical resource block PRB pair, and the first slot of PRB14, which is the second highest frequency physical resource block PRB pair. Thus, in DVRB-to-PRB mapping A, physical resource block PRB pairs at target positions as viewed from the center of the system band are allocated to the distributed virtual resource blocks in order from the both ends of the system band toward the center.

  When the number of distributed virtual resource blocks DVRB to be allocated at the same time is large, the base station apparatus 1 uses DVRB-to-PRB mapping B that allocates the distributed virtual resource block DVRB to the physical resource block PRB pair as shown in FIG. In FIG. 11, the horizontal axis indicates frequency, and the physical resource block PRB pairs PRB1 to PRB15 that are arranged over the system band from the low frequency to the high frequency are assigned to the first slot and the second slot of each PRB15. The distributed resource blocks DVRB and their order are indicated by symbols DVRB1 to DVRB14. In DVRB-to-PRB mapping B, as shown in FIG. 11, the base station apparatus 1 sets a pair of physical resource block PRB pairs spaced at half the system bandwidth, and basically a physical resource block PRB having a low frequency. The distributed virtual resource block DVRB associated with the pair set is preferentially used.

  That is, DVRB1, which is the first used distributed virtual resource block DVRB, has the first slot of PRB1, which is the physical resource block PRB pair with the lowest frequency, and half of the system bandwidth (here, 8 physical resource blocks PRB). The allocated virtual resource block DVRB DVRB2, which is assigned to the second slot of the PRB 9 which is the physical resource block PRB pair with an interval, is adjacent to the high frequency side of the physical resource block PRB pair, PRB1. Are assigned to the first slot of PRB2, which is a physical resource block PRB pair, and to the second slot of PRB10, which is a physical resource block PRB pair with an interval of half the system bandwidth.

  The third distributed virtual resource block DVRB DVRB3 used next is the first slot of the physical resource block PRB pair PRB3 adjacent to the high frequency side of the physical resource block PRB pair PRB2, and the physical resource block PRB. DVRB4, which is the distributed virtual resource block DVRB that is assigned to the second slot of PRB11, which is the physical resource block PRB pair adjacent to the high frequency side of PRB10 that is the pair, is the physical resource block PRB pair. It is assigned to the first slot of PRB4 and the second slot of PRB12 which is a physical resource block PRB pair. Thus, in DVRB-to-PRB mapping B, a set of physical resource block PRB pairs spaced at half the system bandwidth in order from the lowest to the highest frequency of the system band is a distributed virtual resource block. Assigned to

  In the DVRB-to-PRB mapping B, the distributed virtual resource block DVRB allocated to one mobile station apparatus 2 is a distributed virtual resource block DVRB having consecutive numbers represented by the VRB start position and the number of VRBs. The numbers of the distributed virtual resource blocks DVRB may not be continuous between the mobile station devices 2. There are two mobile station apparatuses 2, distributed virtual resource blocks DVRB of DVRB 1 to DVRB 3 are assigned to the first mobile station apparatus 2, and distributed virtual resources of DVRB 8 to DVRB 9 are allocated to the second mobile station apparatus 2. A resource block DVRB may be allocated.

  In DVRB-to-PRB mapping B, the frequency interval between two physical resource blocks PRB of the physical resource block PRB pair associated with each distributed physical resource block DVRB is eight physical resource blocks PRB. In DVRB-to-PRB mapping A, the frequency interval between two physical resource blocks PRB of the physical resource block PRB pair associated with the distributed virtual resource block DVRB8 is equal to eight physical resource blocks PRB, and distributed virtual resource block DVRB9. The frequency interval between two physical resource blocks PRB of the associated physical resource block pair is six physical resource blocks PRB.

  In this case, the radio resource control unit 11 of the base station apparatus 1 performs DVRB-to-PRB mapping A when the number of distributed virtual resource blocks DVRB to be allocated simultaneously is up to eight (half the transmission bandwidth of the base station apparatus 1). Then, the transmission processing unit 13 assigns the distributed virtual resource block DVRB using the selected mapping rule. On the other hand, when the number of distributed virtual resource blocks DVRB is nine or more, the DVRB-to-PRB mapping B is selected, and the transmission processing unit 13 assigns the distributed virtual resource block DVRB using the selected mapping rule.

  That is, the frequency interval between the two physical resource blocks PRB of the physical resource block PRB pair associated with the distributed virtual resource block DVRB in DVRB-to-PRB mapping A is equal to each distributed virtual resource of DVRB-to-PRB mapping B. Move to a distributed virtual resource block DVRB that is smaller than the frequency interval between two physical resource blocks PRB of the physical resource block PRB pair associated with the block DVRB (9 physical resource blocks PRB half of the transmission bandwidth of the base station apparatus 1) When the station apparatus 2 is allocated, the resource association unit 15 determines that the number of distributed virtual resource blocks DVRB is large, and associates the distributed virtual resource block DVRB and physical resource block PRB pair with DVRB. -T Switch to -PRB mapping B.

  The reverse control is also performed. The base station apparatus 1 uses the association between the distributed virtual resource block DVRB and the physical resource block PRB pair in the resource association unit 15 of the radio resource control unit 11 shown in FIG. 2, that is, uses DVRB-to-PRB mapping A or DVRB- It is determined whether to-PRB mapping B is used, a flag is set, and radio resource allocation information including at least the flag, the VRB start position, and the number of VRBs is transmitted by the transmission processing unit 13 using the downlink control channel. The control unit 21 is instructed.

  Next, the procedure in which the mobile station apparatus 2 recognizes the resource element in which the downlink shared data channel constituting the distributed virtual resource block DVRB allocated to the mobile station apparatus 2 is allocated (the signal of the distributed virtual resource block DVRB is allocated). Will be described. FIG. 12 shows a procedure for the mobile station apparatus 2 to receive the distributed virtual resource block DVRB allocated to the mobile station apparatus 3, that is, a procedure for recognizing the resource element in which the distributed virtual resource block DVRB is arranged from the subframe. It is a flowchart to explain.

  First, the reception processing unit 23 of the mobile station apparatus 2 detects a control format indicator channel arranged in a predetermined resource element from the received subframe, and the control unit 21 that receives this detects the control format indicator. Recognize (S1). Next, the control unit 21 recognizes the OFDM symbol in which the downlink control channel and the downlink shared data channel are configured in the received subframe, based on the control format indicator recognized in step S1.

  Next, according to the instruction of the control unit 21, the reception processing unit 23 of the mobile station apparatus 2 separates the downlink control channel from the received subframe, and further demodulates and decodes the downlink control channel. Receiving this decoding result, the control unit 21 acquires the flag (S2), the VRB start position, and the number of VRBs included in the downlink control channel (S3). The control unit 21 recognizes the correspondence between the distributed virtual resource block DVRB and the physical resource block PRB pair from the flag, and sets the distributed virtual resource block DVRB number assigned to the mobile station apparatus 2 to 1 based on the VRB start position and the number of VRBs. Recognize one or more.

  The control unit 21 associates the distributed virtual resource block DVRB with the physical resource block PRB pair and the physical resource in which the distributed virtual resource block DVRB allocated to the mobile station apparatus 2 is arranged from the allocated distributed virtual resource block DVRB number. The mobile station apparatus 2 recognizes the resource element in which the block PRB number and the physical resource block PRB, that is, the resource of the distributed virtual resource block DVRB are arranged (S4), and extracts the signal of these resource elements, thereby The reception processing unit 23 is instructed to extract the signal of the distributed virtual resource block DVRB allocated to the, and to demodulate and decode it.

  Note that the radio resource allocation information of the distributed virtual resource block DVRB mapping may be configured by a tree-based method by combining information, instead of indicating the VRB start position and the VRB number in separate information fields (bit fields). . FIG. 13 shows a case in which the information of the VRB start position and the number of VRBs is combined and configured by the tree-based method. Here, a case where 15 distributed virtual resource blocks DVRB and the number of continuously allocated VRBs is 2 is shown. As shown in FIG. 13, possible combinations are numbered when the number of continuously assigned VRBs is 1 and 2. Here, there are 29 combinations, and each combination can be indicated using 5 bits (32 states).

  That is, in FIG. 13, the lowest level represents the distributed virtual resource block DVRB to be allocated, and the upper two levels indicate values configured by a tree-based method that represents information combining the VRB start position and the number of VRBs. Of the upper two stages, the uppermost stage shows the case where the number of VRBs is 2, and the second stage from the top shows the case where the number of VRBs is 1. For example, when only the distributed virtual resource block DVRB1 is allocated, the number “1” above the DVRB1 in the second stage from the top becomes information combining the VRB start position and the VRRB number, and the distributed virtual resource blocks DVRB2 and DVRB3 Is assigned, the number “17” above the uppermost DVRB2 and DVRB3 is information combining the VRB start position and the VRB number.

  In the present embodiment, the flag is transmitted on the downlink control channel. However, since the flag transmits the same information to all mobile station apparatuses 2, the mobile station apparatus uses a downlink shared data channel or a broadcast channel. 2 and the radio resource allocation information of the distributed virtual resource block DVRB configured in the downlink control channel may be only the VRB start position and the VRB number.

  As described above, when the number of distributed virtual resource blocks DVRB is large, DVRB-to-PRB mapping B is used, and when the number of distributed virtual resource blocks DVRB is small, DVRB-to-PRB mapping A is used. Since the frequency interval between the physical resource block PRB pairs in which each distributed virtual resource block DVRB is arranged is always kept constant (half the system bandwidth) or more, an excellent frequency diversity effect can be obtained.

  The program that operates in the mobile station device 2 and the base station device 1 related to the present invention is a program that controls the CPU or the like (a program that causes a computer to function) so as to realize the functions of the above-described embodiments related to the present invention. Information handled by these devices is temporarily stored in RAM at the time of processing, then stored in various ROMs and HDDs, read out by the CPU, and corrected and written as necessary.

  2, and the downlink shared data channel processing unit 100, the downlink control channel processing unit 110, the reference signal generation unit 120, and the control format indicator signal generation unit 130 in FIG. , Multiplexing unit 140, IFFT unit 151, GI insertion unit 152, D / A unit 153, control unit 21 in FIG. 6, and A / D unit 202 in FIG. 7, GI removal unit 203, FFT unit 204, demultiplexing unit 205, propagation path estimation section 206, propagation path compensation section 207, control format indicator detection section 208, propagation path compensation section 209, data demodulation section 210, turbo decoding section 211, propagation path compensation section 212, QPSK demodulation section 213, Viterbi decoder Reading a program for realizing the function of unit 214 by computer Recorded on capacity recording medium, to read the program recorded in this recording medium into a computer system may perform the processing of each unit by executing. Here, the “computer system” includes an OS and hardware such as peripheral devices.

  The “computer-readable recording medium” refers to a storage device such as a flexible medium, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included. The program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system.

  The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and includes design changes and the like within a scope not departing from the gist of the present invention.

  The present invention is suitable for use in a mobile communication system in which a mobile phone terminal is a mobile station device 2, but is not limited to this.

It is a figure which shows schematic structure of the downlink radio | wireless frame from the base station apparatus 1 to the mobile station apparatus 2 by one Embodiment of this invention. It is a schematic block diagram which shows the structure of the base station apparatus 1 in the embodiment. It is a schematic block diagram which shows the internal structure of the transmission process part 13 of the base station apparatus 1 in the embodiment. It is a figure explaining the slot base hopping used for signal arrangement | positioning of the distributed virtual resource block DVRB when the multiplexing number Nd is 2 in the same embodiment. It is a figure explaining the OFDM symbol base hopping used for signal arrangement | positioning of the distributed virtual resource block DVRB when the multiplexing number Nd is 3 in the same embodiment. It is a schematic block diagram which shows the structure of the mobile station apparatus 2 in the embodiment. It is a schematic block diagram which shows the internal structure of the reception process part 23 of the mobile station apparatus 2 in the embodiment. It is a figure which shows the format of the radio | wireless resource allocation information of the distributed virtual resource block DVRB mapping in the embodiment. The example of the distributed virtual resource block DVRB in the same embodiment is shown. It is a figure which shows DVRB-to-PRB mapping A in the same embodiment. It is a figure which shows DVRB-to-PRB mapping B in the same embodiment. 5 is a flowchart illustrating a procedure for receiving a distributed virtual resource block DVRB assigned to the mobile station device 3 by the mobile station device 2 in the embodiment. It is a figure which shows the case where it comprises with the tree-based method combining the information of the VRB start position and VRB number in the embodiment. It is a figure which shows the outline about the structure of the channel in the conventional EUTRA. It is a figure which shows schematic structure of the downlink radio frame in the conventional EUTRA. It is a figure explaining arrangement | positioning of the downlink pilot channel within 1 physical resource block PRB pair in the downlink of the conventional EUTRA. It is a figure explaining the distributed virtual resource block DVRB mapping in case the conventional multiplexing number Nd is 2. It is a figure explaining the distributed virtual resource block DVRB mapping in case the conventional multiplexing number Nd is 3. FIG. It is a figure which shows the example of the distributed virtual resource block DVRB used with the conventional base station apparatus and mobile station apparatus. It is a figure which shows matching with the distributed virtual resource block DVRB and physical resource block PRB pair in the case of the conventional multiplexing number Nd = 2. It is a figure which shows matching with the distributed virtual resource block DVRB and physical resource block PRB pair in the case of conventional multiplexing number Nd = 2.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Base station apparatus 11 ... Radio | wireless resource control part 12 ... Control part 13 ... Transmission process part 14 ... Reception process part 15 ... Resource matching part 16 ... Allocation information generation part 21 ... Control part 22 ... Transmission process part 23 ... Reception process Unit 100 ... downlink shared data channel processing unit 101 ... turbo coding unit 102 ... data modulation unit 110 ... downlink control channel processing unit 111 ... convolution coding unit 112 ... QPSK modulation unit 120 ... reference signal generation unit 130 ... control format indicator signal Generation unit 140 ... Multiplexing unit 150 ... Transmission processing unit for each antenna 151 ... IFFT unit 152 ... GI insertion unit 153 ... D / A unit 154 ... Transmission RF unit 201 ... Reception RF unit 202 ... A / D unit 203 ... GI removal unit 204 ... FFT section 205 ... Demultiplexing section 206 ... Propagation path estimation section 207 ... Propagation path compensation section 208 ... Control format indicator detection unit 209 ... propagation path compensation unit 210 ... data demodulation unit 211 ... turbo decoding unit 212 ... propagation path compensation unit 213 ... QPSK demodulation unit 214 ... Viterbi decoder unit

Claims (11)

A region in which a plurality of first wireless communication devices and a wireless resource are divided by a predetermined width in the frequency direction and the time direction, and an area serving as an allocation unit of data to be transmitted to the first wireless communication device A virtual resource allocation unit composed of a data signal addressed to the first wireless communication device having a data amount that can be transmitted in a physical resource allocation unit is divided and allocated to a plurality of physical resource allocation units distributed in the frequency direction. A wireless communication system including a second wireless communication device that performs distributed transmission,
The second wireless communication device is:
A rule for combination and order of the physical resource allocation units for allocating the virtual resource allocation unit, wherein one rule is selected from a plurality of preset rules, and the rule is selected using the selected rule. A resource association unit that determines the physical resource allocation unit to allocate a virtual resource allocation unit addressed to one wireless communication device;
Information indicating the rule selected by the associating unit, and the physical resource allocation unit for allocating the virtual resource allocation unit addressed to the first wireless communication apparatus determined by the associating unit, as a virtual resource allocation unit start position An allocation information generating unit that generates radio resource allocation information including at least information represented by a number;
A multiplexing unit that multiplexes the radio resource allocation information with a signal to be transmitted to the first radio communication device;
The first radio communication device extracts the radio resource allocation information from the received signal, and based on the radio resource allocation information, the first radio communication device is the physical resource allocation unit in the received signal, and the first radio communication device A radio communication system, comprising: a demultiplexer that extracts a signal of the virtual resource allocation unit from the physical resource allocation unit to which a virtual resource allocation unit addressed to a communication device is allocated. The resource association unit allocates one virtual resource allocation unit to two physical resource allocation units using the rule selected from the plurality of preset rules.
In the plurality of preset rules, the two physical resource allocation units for allocating one virtual resource allocation unit are in a line-symmetrical positional relationship about the center of the transmission bandwidth of the second wireless communication apparatus The first rule and a second rule, wherein a frequency interval between the two physical resource allocation units is a half of a transmission bandwidth of the second wireless communication device. Wireless communication system. The resource association unit allocates one virtual resource allocation unit to two physical resource allocation units using the rule selected from the plurality of preset rules.
The multiplexing unit allocates the signal of one virtual resource allocation unit to two regions in different time regions among regions divided into two physical resource allocation units in the time direction. The wireless communication system according to claim 1.   The wireless communication system according to claim 2, wherein the first rule preferentially assigns physical resource allocation units close to both ends of a transmission bandwidth of the second wireless communication device.   The radio communication system according to claim 2, wherein the resource association unit selects the one rule based on the number of virtual resource allocation units that perform distributed transmission.   The resource association unit determines the number of virtual resource allocation units that perform distributed transmission, selects the first rule when it is determined to be small, and selects the second rule when it is determined that the number is large. The wireless communication system according to claim 5, wherein the wireless communication system is selected.   When the first rule is used, distributed transmission is performed when the frequency interval between the two physical resource allocation units to which one virtual resource allocation unit is allocated is smaller than half of the transmission bandwidth of the second wireless communication apparatus. The wireless communication system according to claim 6, wherein it is determined that the number of virtual resource allocation units to be performed is large, and that it is determined that the virtual resource allocation unit is small otherwise. The amount of data that can be transmitted in a physical resource allocation unit, which is an area in which radio resources are divided by a predetermined width in the frequency direction and the time direction, and is an area that is an allocation unit of data to be transmitted in radio resources In the first wireless communication apparatus that divides the virtual resource allocation unit composed of the signals of and receives signals transmitted by being allocated to the plurality of physical resource allocation units distributed in the frequency direction,
Information representing the combination and order rules of the physical resource allocation units to which the virtual resource allocation unit is allocated, and information indicating the physical resource allocation unit to which the virtual resource allocation unit is allocated by the start position and the number of virtual resource allocation units Is extracted from the received signal, and based on the radio resource allocation information, the physical resource allocation unit in the received signal, the virtual resource allocation unit addressed to the device is allocated A first radio communication apparatus, comprising: a demultiplexing unit that extracts a signal of the virtual resource allocation unit from the physical resource allocation unit. From the data signal of the amount of data that can be transmitted in the physical resource allocation unit, which is an area in which the radio resource is divided by a predetermined width in the frequency direction and the time direction, and is an area that becomes the data allocation unit in the radio resource In the second radio communication apparatus that performs distributed transmission by dividing the virtual resource allocation unit to be allocated and transmitted to the plurality of physical resource allocation units distributed in the frequency direction,
A rule for the combination and order of the physical resource allocation units to which the virtual resource allocation unit is allocated, wherein one rule is selected from a plurality of preset rules, and the virtual resource allocation unit is selected using the selected rule. A resource association unit for determining the physical resource allocation unit to which the resource allocation unit is allocated;
Radio resource allocation information including at least information indicating a rule selected by the resource association unit and information indicating the physical resource allocation unit to which the virtual resource allocation unit is allocated by a start position and the number of virtual resource allocation units An allocation information generation unit to generate,
A second wireless communication apparatus, comprising: a multiplexing unit that multiplexes the wireless resource allocation information with a signal to be transmitted. The amount of data that can be transmitted in a physical resource allocation unit, which is an area in which radio resources are divided by a predetermined width in the frequency direction and the time direction, and is an area that is an allocation unit of data to be transmitted in radio resources In the radio reception method in the first radio communication apparatus that divides the virtual resource allocation unit composed of the signals of the above and receives signals transmitted by being allocated to the plurality of physical resource allocation units distributed in the frequency direction,
The first wireless communication apparatus includes information indicating a rule of a combination and order of the physical resource allocation units to which the virtual resource allocation unit is allocated, and the physical resource allocation unit to which the virtual resource allocation unit is allocated. A first step of extracting from the received signal radio resource allocation information including at least information represented by a starting position and a number of
Based on the radio resource allocation information, the first radio communication device is the physical resource allocation unit in the received signal, from the physical resource allocation unit to which the virtual resource allocation unit addressed to the device is allocated. And a second step of extracting a signal of the virtual resource allocation unit. From the data signal of the amount of data that can be transmitted in the physical resource allocation unit, which is an area in which the radio resource is divided by a predetermined width in the frequency direction and the time direction, and is an area that becomes the data allocation unit in the radio resource In the radio transmission method in the second radio communication apparatus that divides the virtual resource allocation unit, and performs distributed transmission that allocates and transmits to the plurality of physical resource allocation units distributed in the frequency direction,
The second wireless communication apparatus selects and selects one rule from a plurality of preset rules, which is a combination and order rule of the physical resource allocation units to which the virtual resource allocation unit is allocated. A first step of determining the physical resource allocation unit to which the virtual resource allocation unit is allocated using the rule,
The second wireless communication apparatus determines the information representing the rule selected in the first process, and the physical resource allocation unit to which the virtual resource allocation unit is allocated, by the start position and the number of virtual resource allocation units. A second step of generating radio resource allocation information including at least information representing;
The wireless transmission method comprising: a second process in which the second wireless communication apparatus multiplexes the wireless resource allocation information with a signal to be transmitted.

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